Founded in 2009 and based in France, Sigfox offers a global network designed to complement existing connectivity systems and enable energy-efficient, two-way transmission of small quantities of data over long distances. The company's overall goal is to lower barriers for a wider implementation of IoT products. Sigfox has now raised nearly €280 million in funding, including a €100 million round in February 2015 at a $178 million valuation.

Here’s a look at Sigfox’s previous financing history, along with valuations associated with each round: